A double-sided photovoltaic and photo-thermal integrated collector

Abstract

The application discloses a double-sided photovoltaic and photo-thermal integrated collector, which comprises a main frame, first and second photovoltaic panels arranged on two sides of the main frame respectively, and a heat collecting plate core arranged in the main frame and located between the first and second photovoltaic panels. The heat collecting plate core is provided with first and second heat absorbing blue films on two sides respectively. The double-sided photovoltaic panel can directly absorb solar radiation on the front and back sides, and the back and front sides can simultaneously generate electricity by using reflected light and scattered light of the ground and the environment, so that the photoelectric conversion efficiency and total power generation per unit area are significantly improved.

Description

Technical Field

[0001] This application belongs to the field of solar energy utilization technology, specifically relating to a bifacial photovoltaic-thermal integrated collector. Background Technology

[0002] A photovoltaic (PV) thermal collector is an integrated photovoltaic and solar thermal device that comprehensively utilizes solar energy. It cools photovoltaic modules and recovers waste heat through a heat collection medium, simultaneously outputting electrical and thermal energy. This technology effectively improves the overall conversion efficiency of solar energy, achieving higher energy quality utilization. It has broad application prospects in building energy supply, industrial heat utilization, and other fields, and represents an important development direction for the efficient utilization of solar energy.

[0003] However, existing conventional photovoltaic thermal collectors are typically designed with a single-sided front-side heat collection mode, meaning they absorb solar radiation and exchange heat only through the front of the collector, while the back is usually an insulation layer. This structure prevents the device from utilizing scattered and reflected light from the environment, and it also fails to collect infrared radiation energy from the earth's surface or surrounding objects. This limits the utilization range of solar spectrum energy, resulting in a substantial waste of solar thermal resources and hindering further improvements in the overall energy output efficiency of the system. Utility Model Content

[0004] The purpose of this application is to provide a bifacial photovoltaic-thermal integrated collector that solves the problem of insufficient utilization of sunlight by existing photovoltaic-thermal collectors.

[0005] The objective of this application is achieved through the following technical solution: A bifacial photovoltaic-thermal integrated collector includes a main frame, with a first photovoltaic panel and a second photovoltaic panel respectively on both sides of the main frame, and a heat collection core located between the first photovoltaic panel and the second photovoltaic panel inside the main frame, with a first heat-absorbing blue film and a second heat-absorbing blue film respectively on both sides of the heat collection core.

[0006] Furthermore, the main frame is made of aluminum alloy with a cuboid structure.

[0007] Furthermore, the outer side of the main frame is provided with a heat insulation structure.

[0008] Furthermore, the main frame is a ring frame structure with openings on both sides. The first photovoltaic panel and the second photovoltaic panel are located in the openings on both sides of the main frame, respectively. The inner side of the opening of the main frame is provided with a support edge to support the photovoltaic panel, and the main frame is provided with a pressure strip to press the edge of the photovoltaic panel.

[0009] Furthermore, the heat collection plate core includes a medium flow channel, a first heat collection plate and a second heat collection plate. The outer surface of the first heat collection plate is provided with a first heat-absorbing blue film, and the outer surface of the second heat collection plate is provided with a second heat-absorbing blue film. The medium flow channel is sandwiched between the first heat collection plate and the second heat collection plate.

[0010] Furthermore, the medium flow channel is made of stainless steel, and the first and second heat collection plates are made of aluminum alloy.

[0011] Furthermore, the inner surface of the first heat collection plate is provided with a semi-circular first groove, and the inner surface of the second heat collection plate is provided with a semi-circular second groove, with the medium flow channel located between the first groove and the second groove.

[0012] Furthermore, the heat collection plate core also includes a medium inlet pipe and a medium outlet pipe, and several medium flow channels are connected between the medium inlet pipe and the medium outlet pipe, and the several medium flow channels are sandwiched between the first heat collection plate and the second heat collection plate.

[0013] Furthermore, the medium inlet pipe and the medium outlet pipe are made of stainless steel.

[0014] Furthermore, the medium inlet pipe is located at the lower part of the main frame, and the medium outlet pipe is located at the upper part of the main frame, with both ends of the medium inlet pipe and the medium outlet pipe extending out of the main frame.

[0015] The beneficial effects of this application are: (1) Increased energy output: The double-sided photovoltaic panel can directly absorb solar radiation from the front / back side, and generate electricity by simultaneously utilizing reflected and scattered light from the ground and environment on the back / front side, which significantly improves the photoelectric conversion efficiency per unit area and the total power generation.

[0016] (2) Maximizing solar thermal utilization: The unique vertical arrangement allows for effective light and heat collection on both sides of the collector, breaking the limitation of heat loss on the back of traditional single-sided collectors. This structure is particularly suitable for receiving low-angle sunlight in the early morning and evening and can effectively capture residual heat such as ground infrared radiation from both sides, greatly improving the all-weather thermal energy collection efficiency.

[0017] (3) Structural and scenario optimization: Vertical installation occupies a small area and has a flexible layout, making it particularly suitable for integration with scenarios such as agricultural photovoltaics, building facades, and road noise barriers, achieving efficient and composite utilization of land and space. At the same time, the vertical structure is conducive to natural air convection heat dissipation and rainwater cleaning, and can effectively reduce wind load and improve system stability.

[0018] The aforementioned main solution and its various further alternatives can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding this solution, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here. Attached Figure Description

[0019] Figure 1This is the main view of the structure of this application.

[0020] Figure 2 This is a side view of the structure of this application.

[0021] Figure 3 yes Figure 2 A sectional view.

[0022] Figure 4 This is a front view of the structure of the heat collection plate core in this application.

[0023] Figure 5 This is a cross-sectional view of the heat collector core of this application.

[0024] In the diagram: 1-Main frame, 2-First photovoltaic panel, 3-Second photovoltaic panel, 4-Heat collector core, 5-First heat-absorbing blue film, 6-Second heat-absorbing blue film; 101-Support edge, 102-Pressure strip; 401-Medium inlet pipe, 402-Medium outlet pipe, 403-Medium flow channel, 404-First heat collector plate, 405-First pipe groove, 406-Second heat collector plate, 407-Second pipe groove. Detailed Implementation

[0025] The present application will be further described below with reference to specific embodiments and accompanying drawings.

[0026] refer to Figures 1-5 As shown, a bifacial photovoltaic-thermal integrated collector includes a main frame 1, a first photovoltaic panel 2, a second photovoltaic panel 3, a heat collection core 4, a first heat-absorbing blue film 5, and a second heat-absorbing blue film 6.

[0027] The main frame 1 is used to accommodate or house other components. The two sides of the main frame 1 are respectively equipped with a first photovoltaic panel 2 and a second photovoltaic panel 3. The photovoltaic panels on both sides improve the photoelectric conversion efficiency, so that both direct sunlight and light reflected from nature can be effectively utilized, which is conducive to increasing the total power generation.

[0028] The main frame 1 preferably adopts a vertical arrangement, which allows the front and back to work alternately, effectively capturing direct sunlight and residual heat from infrared radiation from the ground on both sides, greatly improving the all-weather heat collection efficiency. At the same time, the vertical installation occupies less space, is flexible in layout, and is conducive to natural air convection heat dissipation and rainwater cleaning, and can effectively reduce wind load and improve system stability.

[0029] The main frame 1 contains a heat collector core 4 located between the first photovoltaic panel 2 and the second photovoltaic panel 3. The heat collector core 4 absorbs the heat generated on the back of both photovoltaic panels, thereby increasing its temperature and ensuring the final heat generation temperature. Furthermore, the heat collector core 4 cools the photovoltaic panels, improving the photoelectric conversion efficiency and increasing power generation.

[0030] The collector core 4 has a first heat-absorbing blue film 5 and a second heat-absorbing blue film 6 on each side. The heat-absorbing blue films on each side correspond to the photovoltaic panel on that side. The heat-absorbing blue films absorb heat, realizing the effective utilization of the heat generated by the photovoltaic effect of the photovoltaic panel, and then transferring it to the collector core 4 for heating. The main frame 1 forms a closed space inside to prevent the heat generated by the photovoltaic panel from leaking outward.

[0031] The main frame 1 is made of rectangular aluminum alloy, which facilitates its processing and manufacturing as well as its installation. The main frame 1, together with the photovoltaic panels on both sides, forms a closed structure to prevent internal heat from escaping through convection. An insulation structure is provided on the outside of the main frame 1 to prevent internal heat from escaping through radiation.

[0032] The main frame 1 is a rectangular ring structure with openings on both sides. The first photovoltaic panel 2 and the second photovoltaic panel 3 are located in the openings on both sides of the main frame 1, respectively. The photovoltaic panels can be fixed to the main frame 1 with screws or glued to the main frame 1 with sealant.

[0033] The main frame 1 has a support edge 101 for supporting the photovoltaic panel inside the opening. The support edge 101 is integrally formed with the main frame 1. The photovoltaic panel is supported and limited by the support edge 101, so that the photovoltaic panel is kept in the opening position. It absorbs light outward to perform photoelectric effect and dissipates heat inward to perform photothermal effect.

[0034] The main frame 1 is provided with a pressure strip 102 for pressing down the edge of the photovoltaic panel. The pressure strip 102 has an L-shaped structure and is used to press down and limit the photovoltaic panel to prevent it from falling off the main frame 1. It also blocks the gap between the main frame 1 and the photovoltaic panel to prevent debris from entering. The pressure strip 102 is glued or fastened to the main frame 1.

[0035] The heat collection plate core 4 includes a medium inlet pipe 401, a medium outlet pipe 402, a medium flow channel 403, a first heat collection plate 404, and a second heat collection plate 406. The medium inlet pipe 401, the medium outlet pipe 402, and the medium flow channel 403 are made of stainless steel, while the first heat collection plate 404 and the second heat collection plate 406 are made of aluminum alloy.

[0036] The medium inlet pipe 401 is located at the lower part of the main frame 1, and the medium outlet pipe 402 is located at the upper part of the main frame 1. Both ends of the medium inlet pipe 401 and the medium outlet pipe 402 extend out of the main frame 1. The medium enters from the lower part through the medium inlet pipe 401, flows upward after being heated, and then flows out from the upper part through the medium outlet pipe 402. The flow is achieved by gravity due to the difference in temperature and density. The connection between the two ends of the inlet and outlet pipes allows for the parallel arrangement of the solar collectors, enabling several solar collectors to be connected in series for operation.

[0037] Several medium flow channels 403 are welded and connected between the medium inlet pipe 401 and the medium outlet pipe 402. The medium flow channels 403 are sandwiched between the first heat collector plate 404 and the second heat collector plate 406. The medium flow channels 403 are arranged at equal intervals to ensure uniform and sufficient heating. The medium is heated by diverting through the medium flow channels 403, which can fully absorb the heat on the heat collector plate and ensure good heat transfer effect.

[0038] The outer surface of the first heat-collecting plate 404 is provided with a first heat-absorbing blue film 5, and the outer surface of the second heat-collecting plate 406 is provided with a second heat-absorbing blue film 6. The medium flow channel 403 is sandwiched between the first heat-collecting plate 404 and the second heat-collecting plate 406. Heat is absorbed to the heat-collecting plate through the heat-absorbing blue films on both sides, and then the heat is transferred to the medium flow channel through the heat-collecting plate. The first heat-collecting plate 404 and the second heat-collecting plate 406 are connected and fixed by laser spot welding.

[0039] The inner surface of the first heat collection plate 404 is provided with a semi-circular first tube groove 405, and the inner surface of the second heat collection plate 406 is provided with a semi-circular second tube groove 407. The medium flow channel 403 is located between the first tube groove 405 and the second tube groove 407. The flow channel is clamped by the two semi-circular tube grooves to ensure the stable placement of the flow channel and to ensure full contact between the heat collection plate and the flow channel.

[0040] The foregoing basic examples and their further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in this application. In the scheme of this application, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0041] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A bifacial photovoltaic-thermal integrated collector, comprising a main frame (1), characterized in that: The main frame (1) is provided with a first photovoltaic panel (2) and a second photovoltaic panel (3) on both sides respectively. The main frame (1) is provided with a heat collection core (4) located between the first photovoltaic panel (2) and the second photovoltaic panel (3). The heat collection core (4) is provided with a first heat-absorbing blue film (5) and a second heat-absorbing blue film (6) on both sides respectively.

2. The bifacial photovoltaic-thermal integrated collector according to claim 1, characterized in that: The main frame (1) is made of aluminum alloy with a cuboid structure.

3. The bifacial photovoltaic-thermal integrated collector according to claim 1 or 2, characterized in that: The outer side of the main frame (1) is provided with a heat insulation structure.

4. The bifacial photovoltaic-thermal integrated collector according to claim 1 or 2, characterized in that: The main frame (1) is a ring frame structure with openings on both sides. The first photovoltaic panel (2) and the second photovoltaic panel (3) are located in the openings on both sides of the main frame (1). The inner side of the opening of the main frame (1) is provided with a support edge (101) to support the photovoltaic panel. The main frame (1) is provided with a pressure strip (102) to press the edge of the photovoltaic panel.

5. The bifacial photovoltaic-thermal integrated collector according to claim 1, characterized in that: The heat collection plate core (4) includes a medium flow channel (403), a first heat collection plate (404) and a second heat collection plate (406). The outer surface of the first heat collection plate (404) is provided with a first heat-absorbing blue film (5), and the outer surface of the second heat collection plate (406) is provided with a second heat-absorbing blue film (6). The medium flow channel (403) is sandwiched between the first heat collection plate (404) and the second heat collection plate (406).

6. The bifacial photovoltaic-thermal integrated collector according to claim 5, characterized in that: The medium flow channel (403) is made of stainless steel, and the first heat collection plate (404) and the second heat collection plate (406) are made of aluminum alloy.

7. The bifacial photovoltaic-thermal integrated collector according to claim 5 or 6, characterized in that: The inner surface of the first heat collection plate (404) is provided with a semi-circular first tube groove (405), and the inner surface of the second heat collection plate (406) is provided with a semi-circular second tube groove (407). The medium flow channel (403) is located between the first tube groove (405) and the second tube groove (407).

8. The bifacial photovoltaic-thermal integrated collector according to claim 5, characterized in that: The heat collection plate core (4) further includes a medium inlet pipe (401) and a medium outlet pipe (402). A plurality of medium flow channels (403) are connected between the medium inlet pipe (401) and the medium outlet pipe (402). The plurality of medium flow channels (403) are sandwiched between the first heat collection plate (404) and the second heat collection plate (406).

9. The bifacial photovoltaic-thermal integrated collector according to claim 8, characterized in that: The medium inlet pipe (401) and medium outlet pipe (402) are made of stainless steel.

10. The bifacial photovoltaic-thermal integrated collector according to claim 8 or 9, characterized in that: The medium inlet pipe (401) is located at the lower part of the main frame (1), and the medium outlet pipe (402) is located at the upper part of the main frame (1). Both ends of the medium inlet pipe (401) and the medium outlet pipe (402) extend out of the main frame (1).

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